In this glossary, you will find vocabulary and key concepts from "Chapter Three Summary" on page 185 of your book "Heat transfer, a practical approach".
Conduction shape factor
noun
Is the representation of two-dimensional heat transfer in a medium bounded by two isothermal surfaces at two different temperatures.
Example: The direction and density of the fibers determine conduction shape factor.
en: Factor de forma de conducción
Convection resistance
noun
Is the opposition of heat transfer from one place to another due to the movement of fluid.
Example: Natural convection resistance of the pool water is enough to cool the core.
en: Resistencia a la convección
Critical radius of insulation
noun
It is the radius of insulation before heat transfer increases and after heat transfer decreases.
Example: Adding insulation to a cylindrical pipe or a spherical shell will increase the rate of heat transfer if the outer radius of the insulation is less than the critical radius of insulation.
en: Radio crítico de aislamiento
Cylinder conduction resistance
noun
Is the thermal resistance relation which describes the opposition of heat conduction through a cylinder layer.
Example: It is a useful test for ranking materials of low or medium cylinder conduction resistance.
en: Resistencia a la conducción del cilindro
Efficiency
noun
Is a measure of how near a process is to being perfect.
Example: In order for cooling towers to operate at maximum efficiency, it's important to remove contaminants.
en: Eficiencia, Eficacia, Rendimiento
Fin effectiveness
noun
It is defined as the ratio of the actual heat transfer that takes place from the fin to the heat that would be dissipated from the same surface area without fin.
Example: The performance of the fins is judged on the basis of the enhancement in heat transfer relative to the no-fin case and is expressed in terms of the fin effectiveness.
en: Eficacia de álabe, Efectividad de alerón
Fin efficiency
noun
Is the ratio of the heat transferred by a fin to the heat that would have been transferred if the total fin surface were at the base (or wall) temperature.
Example: The fin efficiency is calculated using a theoretical approach where the whole fin is considered to be at the same temperature as the fin base.
en: Eficiencia de álabe, Eficiencia de alerón
Interface resistance
noun
Is a measure of an interface's resistance to thermal flow.
Example: This is the degree of interface resistance of a liquid to flow.
en: Resistencia de interfase
Plane wall conduction resistance
noun
Is the thermal resistance relation which describes the opposition of heat conduction through plane walls that consist of two or more layers.
Example: In the field of building materials, new products with great plane wall conduction resistance are being developed.
en: Resistencia a la conducción de la pared plana
Radiation resistance
noun
Is the thermal resistance of the surface against radiation.
Example: The cellular mechanisms underlying this radiation resistance are, however, still largely unknown.
en: Resistencia a la radiación
Sphere conduction resistance
noun
Is the thermal resistance relation which describes the opposition of heat conduction through a spherical layer.
Example: Some spherical surfaces have an even higher sphere conduction resistance.
en: Resistencia a la conducción de la esfera
Surfaces
plural noun
Are planes or curved two-dimensional locus of points (such as the boundary of a three-dimensional region).
Example: Finned surfaces are commonly used in practice to enhance heat transfer.
en: Superficies
Thermal contact conductance
noun
Is a property indicating the thermal conductivity, or ability to conduct heat, between two bodies in contact.
Example: A drop of oil or silicone grease must be applied between the surface and the sensor so as improving the thermal contact conductance.
en: Conductancia al contacto térmico
Thermal contact resistance
noun
Is the inverse of thermal contact conductance, is a property indicating the ability to not conduct heat between two bodies in contact.
Example: High chemical and thermal contact resistance is necessary in order to achieve pressure-resistant permanent density.
en: Resistencia al contacto térmico
Total thermal resistance
noun
Is defined as the ratio of the temperature difference between the two faces of a material to the rate of heat flow per unit area.
Example: The total thermal resistance of a material is a measure of the resistance it offers to the passage of conducted heat at a steady rate.
